Pioneer Cables 850008 Engine Rocker Arm Stud

Engine Rocker Arm Stud for OE Rockers

Pioneer Cables 850008 is an engine rocker arm stud for applications using 3/8" studs with OE rockers and Posi-Locks. It is listed across a wide range of Chevrolet, Ford, Mercury, Lincoln, Pontiac, Oldsmobile, and related passenger car platforms from 1957-1997.

• Engine rocker arm stud for OE rocker arm setups
• 3/8" stud specification noted in fitment
• Compatible with Posi-Locks applications
• Fits a broad range of classic and late-model V8-era platforms
• Pioneer Cables part number 850008

Fitment Coverage

Compatible With select Chevrolet Camaro, Corvette, Caprice, Impala, Monte Carlo, Malibu, Bel Air, Monza, and Nova applications, plus Ford Mustang, Thunderbird, LTD, and LTD Crown Victoria models, when the vehicle uses the listed 3/8" stud and OE rocker configuration. This part number 850008 also appears in Pontiac Firebird, LeMans, GTO, Grand Prix, Catalina, Bonneville, and related applications, along with Mercury Cougar, Capri, Marquis, Montego, and Grand Marquis platforms.

• Fits 1967-1997 Chevrolet Camaro, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1984-1997 Chevrolet Corvette, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1957-1982 Chevrolet Corvette, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1966-1996 Chevrolet Caprice, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1994-1996 Chevrolet Impala, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1959-1985 Chevrolet Impala, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1982-1995 Ford Mustang, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1979 Ford Mustang, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968-1973 Ford Mustang, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1991-1993 Ford Thunderbird, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1983-1988 Ford Thunderbird, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977-1981 Ford Thunderbird, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1991-1993 Mercury Cougar, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1983-1988 Mercury Cougar, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977-1981 Mercury Cougar, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968-1971 Mercury Cougar, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1984-1992 Lincoln Mark VII, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1987-1991 Ford LTD Crown Victoria, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1987-1991 Mercury Colony Park, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1979-1991 Mercury Grand Marquis, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1982-1991 Pontiac 6000, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1985-1991 Pontiac Grand Am, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1973-1975 Pontiac Grand Am, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1981-1990 Lincoln Town Car, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1970-1988 Chevrolet Monte Carlo, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1984-1988 Pontiac Fiero, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1982-1987 Lincoln Continental, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1980 Lincoln Continental, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977-1986 Ford LTD, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968-1972 Ford LTD, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1982-1986 Mercury Capri, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1979 Mercury Capri, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1982-1986 Pontiac Firebird, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968-1979 Pontiac Firebird, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977-1984 Pontiac Phoenix, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1973-1983 Chevrolet Malibu, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1964-1967 Chevrolet Malibu, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1980-1983 Lincoln Mark VI, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1979-1982 Mercury Marquis, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1981 Chevrolet Bel Air, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1957-1975 Chevrolet Bel Air, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977-1980 Lincoln Versailles, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1975-1980 Mercury Monarch, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977-1980 Pontiac Sunbird, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1976-1979 Chevrolet Monza, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1969-1979 Chevrolet Nova, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1978-1979 Ford Fairmont, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1978-1979 Mercury Zephyr, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1978-1979 Oldsmobile Cutlass, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977-1979 Oldsmobile Omega, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1975-1979 Pontiac Grand LeMans, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1976-1979 Pontiac Laurentian, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968-1979 Pontiac LeMans, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1976-1979 Pontiac Parisienne, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1978 Oldsmobile Cutlass Supreme, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977 Oldsmobile Custom Cruiser, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1977 Oldsmobile Delta 88, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1970-1977 Pontiac Bonneville, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1970-1977 Pontiac Catalina, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1970-1977 Pontiac Grand Prix, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968-1974 Mercury Montego, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1970-1973 Pontiac GTO, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968-1971 Pontiac Acadian, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1970 Pontiac Tempest, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers
• Fits 1968 Pontiac Tempest, N/A, Posi-Locks - 3/8" Stud - w/O.E. Rockers

Common Repair Uses

• Replacing a worn or damaged rocker arm stud in an OE rocker setup
• Restoring valvetrain stability on classic Chevrolet, Ford, Mercury, Lincoln, and Pontiac engines
• Addressing rocker arm looseness or inconsistent valve train geometry
• Supporting repair work on Posi-Locks applications with a 3/8" stud

Installation Notes

Verify the engine uses the listed 3/8" stud and OE rocker configuration before ordering. Match the application by year, make, and model, since the fitment list includes multiple platform-specific variations. Confirm rocker arm and stud dimensions during teardown, and inspect related valvetrain components for wear before reassembly.

Quality Assurance

Pioneer Cables part 850008 is cataloged for direct application matching across the listed vehicles and engine hardware configurations. Use the fitment notes to confirm the correct OE rocker and Posi-Locks setup before installation.